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Electrochemical investigation of electrodeposited platinum nanoparticles on multi walled carbon nanotubes for methanol electro-oxidation

Mokarami Ghartavol, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s12039-017-1346-7
  3. Abstract:
  4. Abstract: The electrodeposition of platinum nanoparticles (PtNPs) on multiwall carbon nanotubes (MWCNTs)/fluorine-doped tin oxide glass (FTO) was investigated. Nucleation and growth mechanisms were studied via Scharifker and Hills model. Chronoamperometry results clearly show that the electrodeposition processes are diffusion-controlled and the diffusion coefficient is 1.5×10-5cm2/s. The semi-spherical particles with lamellar morphology were observed in 1M H 2SO 4, while a petal shape was discerned in 0.5M H 2SO 4. Also, dispersion, size, and uniformity of PtNPs were investigated, where the finer distribution of PtNPs with the average size less than 100 nm was obtained in 0.5M H 2SO 4 solution, and the mean diameter of Pt crystals was 20 nm. Finally, the electro-oxidation of methanol and oxygen reduction studied via cyclic voltammetry showed that as-prepared PtNPs/MWCNTs electrodes had superb electrocatalytic activity. Graphical Abstract:: Electrodeposition of platinum nanoparticles (PtNPs) on multiwall carbon nanotubes (MWCNTs)/flourine-doped tin oxide glass (FTO) was conducted successfully. The electrodeposition mechanism of PtNPs nucleation and growth on MWCNTs was studied. It was found that fine and well-distributed PtNPs/MWCNTs electrode shows a high electrochemical activity for methanol electro-oxidation. [Figure not available: see fulltext.]. © 2017, Indian Academy of Sciences
  5. Keywords:
  6. Catalyst ; Mechanism ; Platinum nanoparticles ; Carbon nanotubes ; Catalysts ; Chronoamperometry ; Cyclic voltammetry ; Electrochemical electrodes ; Electrodeposition ; Electrodes ; Electrolytic reduction ; Electrooxidation ; Glass ; Mechanisms ; Methanol ; Nanoparticles ; Nanotubes ; Nucleation ; Oxidation ; Platinum ; Tin ; Tin oxides ; Yarn ; Electrocatalytic activity ; Electrochemical activities ; Electrochemical investigations ; Electrodeposition mechanism ; Electrodeposition process ; Methanol electrooxidation ; Nucleation and growth ; Multiwalled carbon nanotubes (MWCN)
  7. Source: Journal of Chemical Sciences ; Volume 129, Issue 9 , 2017 , Pages 1399-1410 ; 09743626 (ISSN)
  8. URL: https://link.springer.com/article/10.1007/s12039-017-1346-7